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Knight's Mechanical Encyclopedia (ed. Knight) 5 1 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
rough a 7/8-inch nozzle. It was ignited at the station, and drawn by horses to the fire. The time occupied in getting up steam was eighteen minutes. The motion of the wheels worked the bellows to blow the fire in the furnace. Cincinnati was the first city to adopt the steamer as a permanent portion of its fire-department force. This was due to the inventive and constructive skill of the brothers Latta and Mr. Abel Shawk, supplemented by the foresight, persistence, and tact of Mayor Miles Greenwood, all of that city. The metropolitan fire-department of New York City numbers 34 steamers of about 50-horse power each, equal to 185 men, or in the aggregate 6,290 men; while the actual number of men employed, even adding the 12 hook-and-ladder companies, is only about 550; thus relieving 5,740 men from the labors, dangers, and exposure of the fireman. English steam fire-engine. The Cincinnati engines and system are excelled nowhere, and have been copied into the principal c
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
ning-machine. Spoke-tenoning machine. Fay's gap-bed tenoning-machine. Weight or Power required to tear asunder one Square Inch. metals. Lbs. Copper, wrought34,000 Copper, rolled36,000 Copper, cast, American24,250 Copper, wire61,200 Copper, bolt36,800 Iron, cast, Low Moor, No. 214,076 Lbs. Iron, Clyde, No. 116,125 Iron, Clyde, No. 323,468 Iron, Calder, No. 113,735 Iron, Stirling, mean25,764 Iron, mean of American31,829 Iron, mean of English19,484 Lbs. Iron, Greenwood, American45,970 Iron, gun-metal, mean37,232 Iron, wrought wire103,000 Iron, best Swedish bar72,000 Iron, Russian bar59,500 Iron, English bar56,000 Iron, rivets, American53,300 Iron, bolts52,250 Iron, hammered53,913 Iron, mean of English53,900 Iron, rivets, English65,000 Iron, crank shaft44,750 Iron, turnings55,800 Iron, plates, boiler, American48,000 62,000 Iron, plates, mean, English51,000 Iron, plates, lengthwise53,800 Iron, plates, crosswise48,800 Iron, inferior, bar30
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
aft, and thence to a series of small rollers suitably arranged for straightening the wire as they draw it gradually from the reel. In practice, the elbowed shaft is made to revolve with considerable velocity, and as the reel is carried around with it, the torsion thus produced keeps the wire perpetually turning over, thus offering successively every portion of its surface to the proper action of the straightening rolls. See also patents No. 149,666, Mallett, April 14, 1874. 152,987, Greenwood, July 14, 1874. Wire-stretch′er. A tool for straining lightly telegraph or fence wires. Tool for stretching telegraph-wires. The instrument is applied by moving it forward upon and against the wire, so as to force the jaws open to receive it; then on pulling the instrument it grasps the wire tightly. Wire-tem′per-ing Ap′pa-ra′tus. A machine for giving the required degree of hardness to steelwire. Apparatus for tempering steel-wire. It is passed at a proper speed